Ptychococcus arecinus Ptychococcus albertisianus Ptychococcus archboldianus Ptychococcus elatus Ptychococcus guppyanus Ptychococcus kraemerianus Ptychosperma arecinum Ptychosperma novohibernicum Ptychosperma paradoxum Ptychococcus archboldianus var. microchlamys Actinophloeus guppyanus Actinophloeus kraemerianus Drymophloeus paradoxus
World Flora Online, http://www.worldfloraonline.org/, accessed June 20, 2024